Invisible on render surfaces cast shadows?

Hi. I'm wondering if in DAZStudio 4 is possible to make something "invisible" so it won't appear on the the render, but shadows casted from it on other surfaces were normally visible? For example to render different parts of scene separably. I tried to turn off "Visible in render" option but 3Dlight just ignored that prop, like it wasn't there.

Comments

pwCatch will do this, or you can use Shader Mixer with a RayTest brick testing for ray type to be Transmission and setting opacity to White for true and black for everything else (which is pretty well all you'd need - just feed a constant colour into the colour output as you won't even see the surface).